Hi, What's the trace argument to add to the xrootd.cf file to get it to output the queries to locate files to the logs. We're still having problems at RAL with files/servers not being available via the load balancers when they are if you contact them directly. Yours, Chris. -- Chris Brew ([log in to unmask]) +44 1235 446326 Particle Physics Department Rutherford Appleton Laboratory Chilton, Didcot. Oxfordshire. OX11 0QX. United Kingdom.